CLAS AC 7490 사용 설명서 - 페이지 9

{카테고리_이름} CLAS AC 7490에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. CLAS AC 7490 12 페이지. Electronic leak detector for nitro-trace testing (n2-h2)

AC 7490

value will be displayed once the leak source has been located. The table below can be used to approximate the

size of leak:

Max displayed

1 -3

4-6

7-9

Low battery

Replace the 4 AA Alkaline batteries when the red LED on the control panel is lit. Follow battery installation

instructions under Maintenance section.

Audio mute system

To silence or mute the audio beep and alarm signal, press the MUTE button. To restore the audio sound, press the

MUTE button again.

Note: a few seconds is required to restore sound if the mute button is pressed in rapid succession.

Adjusting sensitivity levels

The Leak Detector will default to the NORM sensitivity level automatically once the unit cornes out of the warm up

cycle and the green LED will turn on.

To change sensitivity levels, press the SENS once for Hl sensitivity (red LED will turn on) and again for LO sensitivity

(yellow LED will turn on).

Verifying proper operation of detector

The AC 7490 includes a Leak Test Vial that allows the user to make sure the detector is performing properly.

To test:

1. Remove the colored label dot in the center of the screw cap to expose the vent hole in the top of the screw cap.

(see g. below)

2. Turn on the detector and allow the unit to complete the warm up cycle.

3. Place the sensor close to the small hole in the top of the Leak Test Vial. The beep rate should increase and the

Digital Leak Size lndicator should display a number from 3-6 indicating that the sensor and electronics are working

properly.

NOTE: Store the Test Vial in the nylon bag when not in use to extend the shelf life. Replace Test Vial when the green

coloris less than ¼ full or at the time of the expiration date.

ELECTRONIC LEAK DETECTOR FOR NITRO-TRACE TESTING (N2-H2)

Approx. leak size (oz/an)

<0.1

0.1 à 0.5

>0.5

Approx. leak size (g/an)

3 à 14

>14